The first one is right
Solve by completing the square:
x^2 + 8x + 3=o
x^2 + 8x + 16 -13=0
(x+4)^2-13=0
(x+4)^2=13
x1=sqrt13 - 4
x2=-sqrt13 - 4
or
x^2 + 8x + (4)^2 = -3 + (4)^2
(x+4)^2 = -3 + 16
(x+ 4)^2 = 13
x = + - (-4) sqr 13
Are any of these correct?